Merge pull request #74 from cloudfoundry/release-reminder-date-2

Run release reminder on LAST thursday of the month

buildpack/.github/workflows/release-reminder.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
  determine-date:
- name: Release buildpacks on 2nd and 4th Thursday of the month
+ name: Release buildpacks on 2nd and last Thursdays of the month
  runs-on: ubuntu-22.04
  outputs:
  should_run: ${{ steps.should_run.outputs.bool }}
@@ -20,14 +20,16 @@ jobs:
  echo "bool=true" >> "${GITHUB_OUTPUT}"
  else
  day_of_month=$(date +%d)
- # Check if it's the second or fourth Thursday of the month
+ last_day_cutoff=$(expr $(date -d "-$(date +%d) days month" +%d) - 6)
+ # Check if it's the second or last Thursday of the month
  # second thursday of the month will always be between day 8 and 14 (inclusive)
  if [[ "$day_of_month" -ge "8" && "$day_of_month" -le "14" ]]; then
  echo "It's the second Thursday of the month"
  echo "bool=true" >> "${GITHUB_OUTPUT}"
- # fourth thursday of the month will always be between day 21 and 28 (inclusive)
- elif [[ "$day_of_month" -ge "22" && "$day_of_month" -le "28" ]]; then
- echo "It's the fourth Thursday of the month"
+ # last thursday of the month will always be within 6 days of the last day of the month
+ # $last_day_cutoff=(# days in this month - 6)
+ elif [[ "$day_of_month" -ge "$last_day_cutoff" ]]; then
+ echo "It's the last Thursday of the month"
  echo "bool=true" >> "${GITHUB_OUTPUT}"
  else
  echo "It's another Thursday of the month"